// ret返回值
var retStatus = {
    error : -1,                   // 错误
    success : 0                 // 成功
};
// 审核状态
var onlineStatus = {
    online : 1, //在线
    offline : 0  //不在线
}
var Message={
 set: function() {//最小化与恢复状态切换
  var set=this.minbtn.status == 1?[0,1,'block',this.char[0],'最小化']:[1,0,'none',this.char[1],'恢复'];
  this.minbtn.status=set[0];
  this.win.style.borderBottomWidth=set[0];
  this.content.style.display =set[2];
  this.minbtn.innerHTML =set[3]
  this.minbtn.title = set[4];
  this.win.style.top = this.getY().top;
 },
 close: function() {//关闭
  this.win.style.display = 'none';
  window.onscroll = null;
 },
 setOpacity: function(x) {//设置透明度
  var v = x >= 100 ? '': 'Alpha(opacity=' + x + ')';
  this.win.style.visibility = x<=0?'hidden':'visible';//IE有绝对或相对定位内容不随父透明度变化的bug
  this.win.style.filter = v;
  this.win.style.opacity = x / 100;
 },
 show: function() {//渐显
  clearInterval(this.timer2);
  var me = this,fx = this.fx(0, 100, 0.1),t = 0;
  this.timer2 = setInterval(function() {
   t = fx();
   me.setOpacity(t[0]);
   if (t[1] == 0) {clearInterval(me.timer2) }
  },10);
 },
 fx: function(a, b, c) {//缓冲计算
  var cMath = Math[(a - b) > 0 ? "floor": "ceil"],c = c || 0.1;
  return function() {return [a += cMath((b - a) * c), a - b]}
 },
 getY: function() {//计算移动坐标
  var d = document,b = document.body, e = document.documentElement;
  var s = Math.max(b.scrollTop, e.scrollTop);
  var h = /BackCompat/i.test(document.compatMode)?b.clientHeight:e.clientHeight;
  var h2 = this.win.offsetHeight;
  return {foot: s + h + h2 + 2+'px',top: s + h - h2 - 2+'px'}
 },
 moveTo: function(y) {//移动动画
  clearInterval(this.timer);
  var me = this,a = parseInt(this.win.style.top)||0;
  var fx = this.fx(a, parseInt(y));
  var t = 0 ;
  this.timer = setInterval(function() {
   t = fx();
   me.win.style.top = t[0]+'px';
   if (t[1] == 0) {
    clearInterval(me.timer);
    me.bind();
   }
  },10);
 },
 bind:function (){//绑定窗口滚动条与大小变化事件
  var me=this,st,rt;
  window.onscroll = function() {
   clearTimeout(st);
   clearTimeout(me.timer2);
   me.setOpacity(0);
   st = setTimeout(function() {
    me.win.style.top = me.getY().top;
    me.show();
   },600);
  };
  window.onresize = function (){
   clearTimeout(rt);
   rt = setTimeout(function() {me.win.style.top = me.getY().top},100);     
  } 
 },
 init: function() {//创建HTML
  function $(id) {return document.getElementById(id)};
  this.win=document.createElement('DIV');
  this.win.style.width=210;
  this.win.style.height=530;
  this.win.id="msg_win";
  this.win.innerHTML='<div id="msg_content"></div>';
  document.body.appendChild(this.win);
  var set={minbtn: 'msg_min',closebtn: 'msg_close',title: 'msg_title',content: 'msg_content'};
  for (var Id in set) {this[Id] = $(set[Id])};
  var me = this;
  setTimeout(function() {//初始化最先位置
   me.win.style.display = 'block';
   me.win.style.top = me.getY().foot;
   me.moveTo(me.getY().top);
  },500);
  return this;
 },
  hide: function() {//创建HTML
  function $(id) {return document.getElementById(id)};
  this.win=document.createElement('DIV');
  this.win.style.width=220;
  this.win.style.height=30;
  this.win.id="msg_win";
  this.win.innerHTML='<div class="icos"><a href="javascript:void 0" title="展开" id="msg_show"></a></div><div id="msg_title"></div>';
  document.body.appendChild(this.win);
  var set={minbtn: 'msg_min',showbtn: 'msg_show',title: 'msg_title',content: 'msg_content'};
  for (var Id in set) {this[Id] = $(set[Id])};
  var me = this;
  this.showbtn.onclick = function() {me.close()};
  this.showbtn.innerHTML= '<img src="../image/fold.png">';
  setTimeout(function() {//初始化最先位置
   me.win.style.display = 'block';
   me.win.style.top = me.getY().foot;
   me.moveTo(me.getY().top);
  },500);
  return this;
 }
};
function showWebIm() {
	if(Message.win != null) {
		document.body.removeChild(Message.win);
	}
	Message.init();
    Message.content.style.width="210";
    Message.content.style.height="530";
    Message.content.innerHTML = '<iframe src="webIM.jsp" id="imIframe" name="imIframe" frameborder="NO" border="0" framespacing="0" width="100%" height="100%"></iframe>';
    $("#imIframe").load(function(){  
        $(this).height(528);   
    });
}
function hideWebIm() {
	 if(Message.win != null) {
		 document.body.removeChild(Message.win);
	 }
	 Message.hide();
	 Message.title.innerHTML = '好友街网页聊天';
     Message.win.style.height=30;
}
